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Image recording apparatus

a recording apparatus and image technology, applied in the direction of power drive mechanisms, instruments, printing, etc., can solve the problems of small irregularities formed on the surface of the plate p, and achieve the effect of preventing the reduction of recording strength at both edges of the recording head, excellent results, and effectively inhibiting

Inactive Publication Date: 2012-11-22
PANASONIC CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0008]The present invention is conceived in view of such situations in the conventional technology, and has as an advantage of providing an image recording apparatus that prevents a reduction in recording strength at both edges of the recording head and thus effectively inhibits the occurrence of banding in a printed image.
[0010]According to the present invention, excellent results may be obtained in this way, allowing a reduction in recording strength at both edges of the recording head to be prevented and an occurrence of banding in a printed image to be effectively inhibited.

Problems solved by technology

Thus, there is a situation where irregularities formed on a surface of the plate P become smaller and banding occurs in a printed image.

Method used

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first embodiment

[0026]FIG. 1 is a structural diagram illustrating a schematic configuration of an image recording apparatus 1 according to an embodiment of the present invention. The image recording apparatus 1 records an image by irradiating laser light onto the plate (recording medium) P being used in the CTP printing. The plate P is configured from a heat-reactive thermal CTP plate, a flexographic plate, and the like, and is fixed in place by a clamping mechanism not shown in the drawings so as to be wrapped around the body of the drum 2, which has a cylindrical shape. In the image recording apparatus 1, an image is recorded on the plate P by a plurality of laser lights emitted from a multi-channel recording head 4, while a rotation axis or shaft 2a of the drum 2 is rotatingly driven by a drum motor 3. By intermittently displacing the recording head 4 parallel to the axial direction of the drum 2 with a linear motor (displacer) 5, the recording position of the image on the plate P is sequentiall...

second embodiment

[0059]FIG. 11 is an explanatory diagram of the displacement operation of the recording head 4 in the image recording apparatus 1 according to another embodiment of the present invention, and corresponds to FIG. 7 for the above-described embodiment. The image recording apparatus 1 according to the second embodiment is similar to the first embodiment excepting those aspects relating to operation which are described particularly hereafter. A detailed description of other aspects is omitted.

[0060]In the image recording apparatus 1 according to the second embodiment, an aspect in which image recording for one rotation of the drum 2 and displacement of the recording head 4 in the secondary scanning direction are repeatedly performed is similar to the first embodiment. However, the displacement operation differs. In the second embodiment, a first displacement operation and a second displacement operation are alternately performed repeatedly. Across a range where the cumulative total of the...

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Abstract

An image recording apparatus includes a recording head connected to a plurality of laser emitters provided in a line; a linear motor displacing the recording head in a secondary scanning direction; and an apparatus controller controlling the emission of laser light from the recording head and displacement of the recording head by the displacer. In response to rotation of a drum, one cycle of scanning by the recording head in a main scanning direction of a plate is completed. For each drum rotation, the apparatus controller displaces the recording head in the secondary scanning direction by displacement amount smaller than the recording width in the secondary scanning direction according to laser light emitted from the plurality of laser emitters.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]The present application claims priority under 35 U.S.C. §119 of Japanese Application No. 2011-109634, filed on May 16, 2011, the disclosure of which is expressly incorporated by reference herein in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to an image recording apparatus which records an image by irradiating laser light onto a recording medium such as a plate wrapped around a drum.[0004]2. Description of Related Art[0005]Conventionally, technology exists to improve a recording strength of a laser light irradiating a recording region on a plate (such as a flexographic plate, a letterpress plate, and the like) used in CTP (Computer to Plate) printing in order to reliably record an image on the plate.[0006]A known example of the conventional technology of this type is an image recording apparatus including a displacer and a controller controlling the displacer, the displacer re...

Claims

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Application Information

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IPC IPC(8): B41J25/304
CPCB41J2/45B41J2/455B41J2/475B41J2/47B41J19/20B41J2/46
Inventor HANABUSA, AKIRA
Owner PANASONIC CORP